Three different \({G}\)  networks were tested, all based on the ResNet model [1]}: ResNet-4, ResNet-5, and ResNet-6. ResNet-6 is a part of the original Pix2Pix architecture [2]} and consists of 2 encoder blocks followed by 6 residual blocks and 2 decoder blocks.
ResNet-4 and ResNet-5 consist of the same number of encoder-decoder blocks as ResNet-6, but only 4 and 5 residual blocks, respectively. The two smaller networks were proposed as we work with small image patches of \(64\times 64\)  pixels, see Sec. REF .
